:root {
  --bg: #f7f7fb;
  --card: #ffffff;
  --text: #1c1c28;
  --muted: #5d5d72;
  --accent: #4b3a8f;
  --border: #e4e4ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111118;
    --card: #1b1b26;
    --text: #ececf4;
    --muted: #a3a3b8;
    --accent: #ffc25c;
    --border: #2c2c3a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
header img { width: 64px; height: 64px; border-radius: 15px; }
h1 { font-size: 28px; margin: 0; line-height: 1.2; }
header p { margin: 2px 0 0; color: var(--muted); }
h2 { font-size: 20px; margin: 32px 0 8px; }
section { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 8px 24px 20px; margin-bottom: 20px; }
ul { padding-left: 20px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 14px; }
nav { margin-top: 32px; font-size: 14px; }